Denitrifying activity measurements using an anoxic titration (pHstat) bioassay

An anoxic titrimetric test was investigated for measuring denitrifying activity in an activated sludge system. The method measures the amount of acid that is required to maintain the pH set-point value in a batch denitrification experiment. An iterative algorithm was implemented to extract nitrate u...

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Bibliographic Details
Published in:Water science and technology 2002-01, Vol.46 (9), p.211-218
Main Authors: FOXON, K. M, BROUCKAERT, C. J, ROZZI, A
Format: Article
Language:English
Subjects:
Acids
Activated sludge
Activated Sludge Process
Anoxia
Applied sciences
Automation
Bio-assays
Bioassays
Biological and medical sciences
Biological Assay
Biological treatment of waters
Biotechnology
By products
Carbon dioxide
Computer simulation
Computer software
Data
Data processing
Denitrification
Environment and pollution
Environmental Monitoring
Exact sciences and technology
Experiments
Fundamental and applied biological sciences. Psychology
General purification processes
Hydrogen-Ion Concentration
Industrial applications and implications. Economical aspects
Iterative algorithms
Mathematical models
Methods
Nitrates
Nitrogen - metabolism
pH effects
Pollution
Sludge
Software
Titration
Uptake
Waste Disposal, Fluid
Wastewaters
Water treatment and pollution
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Description
Summary:An anoxic titrimetric test was investigated for measuring denitrifying activity in an activated sludge system. The method measures the amount of acid that is required to maintain the pH set-point value in a batch denitrification experiment. An iterative algorithm was implemented to extract nitrate uptake rate (NUR) data from titration data, since the accumulation and depletion (stripping) of reaction by-products HCO3- and CO2 affects the direct calculation of denitrifying activity from titration data. This method was performed using an automatic pH-stat acid dosing system, and the data were analysed using the simulation software package, AQUASIM.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2002.0241